Hole spotter



Oct. 29, 1940. H. J. SCHORLE HOLE SPOTTER Filed March 21, 19:58 2 Shets-Sheet 1 IN VEN TOR HERMANJ SCHORLE A ORNE Y H."J. SCHORLE HOLE SPOTTER v Oct. 29, 1940.

Filed March 21, 19 38 2 Sheets-Sheet 2 v i H w ERMANJ. 56:40am;

NVENTOR Patented Oct. 29, 1940 UNITED STATES HOLE SPOTTER Herman J. Schorle,

Astoria, Long Island, N. Y.,

assignor to Worthington Pump and Machinery Corporation, Delaware Harrison, N. J., a corporation of 6 Claims.

This invention relates to rock drilling equipment, and more particularly to a hole spotter for holding and guiding drill steels during the starting of a drill hole.

An object of the invention is to provide a hole spotter which is a unitary structure and may be attached to conventional types of rock drilling machines such as those shown in Patents N bers 914,737, 1,690,859, and 709,022, and which can be quickly and easily moved into drillsteel holding and guiding position or moved out of drill steel holding and guiding position and clear of the drill steel so as not to interfere with the continued operation of the drilling machine after the hole has. been started.

With these and other objects in view, as may appear from the accompanying specification, the invention consists of various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing a hole spotter'of the preferred form embodying. the invention, and the features forming the invention will be .specifically pointed out in the claims.

In the drawings:

Figure 1 is a view partly in side elevation and partly in section showing the improved hole spotter attached toa rock drilling machine of standard type.

Figure 2 is a top plan of the improved hole spotter showing it in drill steel guiding position in solid lines and out of drill steel guiding position in dotted lines.

Figure 3 is an end view of the improved hole spotter. v

Figure 4 is a view partly in section and partly in side elevation showing the improved hole spotter out of drill steel guiding position.

Figure 5 is a cross section taken on the line.

55 of Figure 1. a

Figure 6 is a cross section similarto Figure 5 showing certain of the parts in positions differerent from those as shown in Figure 5.

Referring more particularly to the drawings, the improved hole spotter comprises an attaching bracket l which may be attached to the frame A of a rock drilling machine B of any approved type, in any suitable manner. -However, in the drawings the attaching bracket I is shown as mounted upon the end of the feed screw 0 of the drilling machine.

The attaching bracket I has a cylinder 2 formed thereon and a pair of ears 3 project out wardly in spaced relation from the end of the cylinder and form means by which the carrying standard 4 'is pivotally connected by means of the pivot pin 5 to the attaching bracket.

The carrying standard 4 is hollow for a part of its length, being substantially cylindrical in shape and a stem 6 extends into the hollow cylindrical part of the carrying standard l and is rotatably mounted therein. The stem 6 has a pair of drill steel holding and guidingmembers l and fi'formed upon its upper end which drill steel guiding members are spaced laterally from each other, so as to engage upon opposite sides of the drill steel D which is carried and operated by the rock drill E of any approved construction. The guiding members I and 8 are spaced longitudinally from each other a distance greater than the diameter of the drill steel, so that when the stem 6 is rotated a quarter turn, they will clear the drill steel as shown in the dotted line position in Figure 2 of the drawings.

Means are-provided for rotating the stem 6 in the carrying standard :3 and for holding or locking the stem in either of its adjusted positions, that is, for holding and looking it either in drill steel guiding position or in non-guiding position to permit the members I and- 3 to be moved clear of the drill steel for moving them out of the way of continued drilling operation of the drilling machine.

The holding and locking means above referred toalso facilitates or provides means to facilitate the rotating of the stem 6, and it includes a pin or bolt 1 which extends through the stem 6 and has a head 8 attached to its outer end; which is slidable in the cylindrical bore 9 of the operating locking handle iii. A spring H is mounted in. the bore 9 and acts on the operating locking handle ID to urge its inner end into engagement 1 with the flat side [2 of the'stem 6 and into the cylindrical ends l3 of the way M for holding the stem 6 ,inadjusted positions. The way It is formed on the carrying standard i and is concentric with the curvature of the stem and is of sufiicient length to permit the stem to be rotated a quarter turn for moving the guiding member I and 8 either into or out of drill steel guiding positions. The arcuate way 44' has guiding shoulders l5 therein and'when it-is desired to rotate the stem 6 the operating rotating handle I 0 is pulled outwardly into the position as shown in Figure 5 of the drawings with its inner end riding on the shoulders iii. When the stem ii has been rotated through the quarter turn the spring II will cause the rotating locking handle 10' to move into the arcuate recess. H5 at ,the opposite end of the way l l and consequently loci:

the stem against further rotation for holding the member 1 and 8 firmly in position and against vibration or chattering during the operation of the drilling machine.

The inner edges lB of the members I and 8 may be curved to conform to the curvature of the drill steel D. 1

A locking plunger 20 is slidably mounted in. the cylinder 2 of the bracket l and it is hollow, having a spring 2! mounted therein and abutting against the closure plug 22 which closes the rear open end of the cylinder 2. The spring 2i urges the plunger 20 into engagementwith either the rear flat edge of the depending end 23 of the carrying standard 4 or with the end'of the depending flattened end 23 for holding and locking the standard 4 either in drill steel guiding position as shown in Figure 1 or out of drill steel guiding position as shown in Figure 4 of the drawings.

When it is desired to hold the drill steel D steady and guide it during the starting of a drill hole the stem 6 is first rotated to move the members I and 8 out of drill steel guiding position and into the position shown in dotted lines in Figure 2 of the drawings. The carrying standard 4 is then moved on its pivot into its vertical position where it is locked by engagement of the forward end of the plunger 20 against the flat side edge of the end 23 of the standard. The stem 6 is then rotated a quarter turn to bring the members I and 8 into drill steel guiding position as shown in Figures 1 to 3 of the drawings, inclusive.

After the drill hole has been drilled a suflicient distance to eliminate the need of the hole spotter, the stem 6 is rotated to move the members I and 8 out of drill steel guiding position and the standard 4 is moved downwardly into the position shown in solid lines in Figure 4 of the drawings where it remains out of the Way of the continued drilling operation of the drilling machine during the completing of the drill hole.

It will be noted that the corners of the end 23 of the carrying standard 4 are rounded so as to permit them to ride across the forward end of the plunger 20 and force it inwardly against the tension of the spring 2| during the movement of the standard 4 from one position to the other.

It will be understood that the invention is not to be limited to the specific construction or arrangement of parts shown but that they may be widely modified within the invention defined by the claims.

What is claimed is:

1. In a hole spotter for drilling machines, an attaching bracket, a carrying standard pivotally attached to said attaching bracket, a spring pressed plunger carried by said attaching bracket for engagement with said standard to hold the standard in adjusted positions, a drill steel guide comprising a stem and guiding members rigidly carried by said stem, said stem rotatably carried by said standard for rotary movement tomove the guiding members into and out of drill steel guiding position, a handle on said stem, said standard provided with a guide-way receiving the handle for guiding and limiting the movement of the stem.

2. In a hole spotter for drilling machines, an attaching bracket, a carrying standard pivotally attached to said attaching bracket, a spring pressed plunger carried by said attaching bracket for engagement with said standard to hold the standard in adjusted positions, a drill steel guide comprising a stem and guiding members rigidly carried by said stem, said stem rotatably carried by said standard for rotary movement to move the guiding members into and out of drill steel guiding position, a handle on said stem, said standard provided with a guide-way receiving the handle for guiding and limiting the movement of the stem, and means for locking said stem and handle in adjusted positions.

3. The combination with a rock drill and a drill steel carried thereby, of a hole spotter including,

an attaching bracket for attachment to the rock drill, a carrying standard pivotally carried by said attaching bracket for pivotal movement into or out of operative position in the Vertical plane of the axis of the drill steel, a stem rotatably carried by said pivotal standard for rotary movement about an axis transversely of the axis of pivotal movement of the standard, drill steel guiding members formed on said stem, said stem being rotatable to move the guiding members into or out of drill steel guiding position independently of movement of the standard, a spring pressed plunger carried by said attaching bracket and having a standard engaging surface, companion surfaces on said standard for engagement by said spring pressed plunger to hold the standard in adjusted positions, and adjustable means for regulating the tension of said spring pressed means.

4. The combination with a rock drill and a drill steel carried thereby, of a hole spotter including, an attaching bracket for attachment to the rock drill, a carrying standard pivotally carried by said attaching bracket for pivotal movement into or out of operative position in the Vertical plane of the axis of the drill steel, a stem rotatably carried by said pivotal standard for rotary movement about an axis transversely of the axis of pivotal movement of the standard, drill steel guiding members formed on said stem, said stem being rotatable to move the guiding members into or out of drill steel guiding position independently of movement of the standard, a spring pressed member carried by said attaching bracket and having means thereon for cooperation with companion means associated with said standard to hold the standard against vibratory movement,

and adjustable means for regulating the tension of the spring.

5. The combination with a rock drill and a drill steel carried thereby, of a hole spotter including, an attaching bracket for attachment to the rock drill, a carrying standard pivotally carried by said attaching bracket for pivotal movement into or out of operative position in the vertical plane of the axis of the drill steel, a stem rotatably carried by said pivotal standard for rotary movement about an axis extending at right angles to the axis of pivotal movement of the standard, drill steel guiding members formed on said stem, said stem being rotatable to move the guiding members into or out of drill steel guiding position independently of movement of the standard, and spring pressed means carried by said attaching bracket for holding the standard in adjusted positions against vibratory movement independently of the bracket.

6. The combination with a rock drill and a drill steel carried thereby, of a hole spotter including,

an attaching bracket for attachment to the rock drill, a carrying standard pivotally carried by said attaching bracket for pivotalmovement into or out of operative position in the vertical plane of the axis of the drill steel, a stem carried by said pivotal standard for rotary movement relative to the standard about an axis extending at right angles to the axis of the pivotal movement of the standard, and for limited vertical movement relative to the standard, drill steel guiding members formed on said stem, said stem being rotatable to move the guiding members into or out of drill steel guiding position independently of move ment of the standard, and means for preventing vibratory movement of the standard relative to the bracket. 

